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Equity - Dividend Restrictions, Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2023
Class of Stock [Line Items]    
Percent of insurer's policyholder surplus available for dividends 10.00%  
Statutory Dividend Payment Restrictions Disclosure There are no current restrictions on HFSG Holding Company's ability to pay dividends to its stockholders.  
HLA    
Class of Stock [Line Items]    
Proceeds from Dividends Received $ 240  
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval 408  
HLA | Scenario, Forecast    
Class of Stock [Line Items]    
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval   $ 400
P&C Subsidiaries    
Class of Stock [Line Items]    
Proceeds from Dividends Received 1,400  
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval 1,800  
P&C Subsidiaries | AmountAvailableAfterStateDepositAndRegulatoryCapitalRequirements    
Class of Stock [Line Items]    
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval 1,500  
P&C Subsidiaries | Scenario, Forecast    
Class of Stock [Line Items]    
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval   $ 1,500
Mutual Fund [Member]    
Class of Stock [Line Items]    
Proceeds from Dividends Received 157  
Harford Holdings, Inc. [Member]    
Class of Stock [Line Items]    
Proceeds from Dividends Received 50  
P&C Runoff Subsidiaries    
Class of Stock [Line Items]    
Proceeds from Dividends Received $ 395